EVERYDAY SCIENCE

Detailed explanation-1: -In bryophytes and pteridophytes, transport of male gamete requires water. The male gametes of bryophytes and pteridophytes are motile and can swim through water with the help of their flagella. They are transferred to the female reproductive organ for fertilsation.

Detailed explanation-2: -Pteridophytes are tracheophyte vascular plants i.e. they have tissues specialized in conduction of water and nutrients. Bryophytes are nonvascular plants. In pteridophytes therefore the substance transport is done through vessels and in bryophytes that transport occurs by diffusion.

Detailed explanation-3: -In plants like algae, bryophytes and pteridophytes, water is the medium through which gamete transfer takes place.

Detailed explanation-4: -Assertion :Hydrophily constitutes a major mode of pollination in most of the aquatic angiospermous plants. Reason: Almost all the aquatic dicot and monocot plants require water for the transport of male gametes and for fertilisation.

Detailed explanation-5: -Explanation: In bryophytes and pteridophytes, transport of male gametes requires water. The male gametes, produced by reproductive structures called antheridia, are free-swimming sperm cells that need water to transport them to the female gametes, which are enclosed within structures called archegonia.